It often happens that the developer does not update the page of the site he is working on, and after the expiration of time this leads to a logout due to "inactivity". On some (especially old) sites, this can be quite painful, and even just annoying. This class allows you to solve this problem, without having to edit the configuration responsible for the session lifetime.

Include the script with CDN:

<script src="https://cdn.jsdelivr.net/gh/YakutD/SessionAlarm/SessionAlarm.min.js"></script>

Create an instance of the SessionAlarm class and call the initialization function:

<script>
    var sessionAlarm = new **SessionAlarm**;
    sessionAlarm.init(5);
</script>

The class can work in two modes: page reload (default mode) and ajax request.

• init(seconds, [options]) - initializing method, the only public method at the time of SessionAlarm instance creation. A second call will completely reset and cancel all previously set reloads / ajax requests. Prints a warning to the console when called, mentioning the enabled mode.
  • seconds (Number) - number of seconds before reloading/ajax request.
  • options (Object) - allows you to select the SessionAlarm mode, make a reminder about the upcoming reboot or call a confirmation window. Possible properties:
    • remind (Number) - the number of seconds before a warning about an upcoming reboot is displayed in the console. The argument must be LESSER than seconds.
    • confirm (Boolean) - display a confirmation window before rebooting. The window is an HTML dialog element with three buttons: Confirm, Restart and Cancel.
    • ajax (Object) - the presence of this property automatically determines the mode of operation of SessionAlarm as ajax requests, remind and confirm are ignored in this case.
      • url (String) - required property that defines the URL for the upcoming ajax request.
      • method (String) - optional property that defines the method for the upcoming ajax request. The default is GET.
• restart() - becomes available after a successful call to init. A method that restarts the countdown until the reload/ajax request. Prints a warning to the console when called.
• cancel() - becomes available after a successful call to init. The method cancels the previously set reload/ajax request. Prints a warning to the console when called.

<script>
    var sessionAlarm = new SessionAlarm;
    sessionAlarm.init(5); // Reload in 5 seconds
    sessionAlarm.init(5, {remind: 3, confirm: true}); // Reload after 5 seconds, with a warning after 3 and a confirmation window
    sessionAlarm.init(5, {ajax: {url: '/', method: 'POST'}}); // POST request (ajax) to index page after 5 seconds instead of reload
</script>

If a file with the SessionAlarm class is included, you will always see the corresponding warning in the console, even if the init method has not been called.